From: Birger Koblitz <mail@birger-koblitz.de>
To: Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>
Cc: linux-usb@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Chih Kai Hsu <hsu.chih.kai@realtek.com>,
Birger Koblitz <mail@birger-koblitz.de>
Subject: [PATCH net-next v2 2/4] r8152: Add support for the RTL8159 chip
Date: Wed, 29 Apr 2026 19:01:10 +0200 [thread overview]
Message-ID: <20260429-rtl8159_net_next-v2-2-bab3cd4e4c66@birger-koblitz.de> (raw)
In-Reply-To: <20260429-rtl8159_net_next-v2-0-bab3cd4e4c66@birger-koblitz.de>
The RTL8157 re-uses the packet descriptor format introduced with the
RTL8157 and other hardware features of the RTL8157 (RTL_VER_16) such
as the SRAM access. The support therefore consists in expanding the
existing RTL8157 code for initialization and USB power management
to also be used for the RTL8159 (RTL_VER_17).
Most of the addiitonal code is added in r8157_hw_phy_cfg() to configure
the RTL8159 PHY.
Add support for the USB device ID of Realtek RTL8157-based adapters. Detect
the RTL8159 as RTL_VER_17 and set it up.
Signed-off-by: Birger Koblitz <mail@birger-koblitz.de>
---
drivers/net/usb/r8152.c | 257 ++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 249 insertions(+), 8 deletions(-)
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 01e65d845f8732f23427305423e4e270dae775dc..2a07dde289e2240b221664ae5c5bceec35b5a1ef 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1247,6 +1247,7 @@ enum rtl_version {
RTL_VER_14,
RTL_VER_15,
RTL_VER_16,
+ RTL_VER_17,
RTL_VER_MAX
};
@@ -3432,6 +3433,7 @@ static void rtl8152_nic_reset(struct r8152 *tp)
break;
case RTL_VER_16:
+ case RTL_VER_17:
ocp_byte_clr_bits(tp, MCU_TYPE_PLA, PLA_CR, CR_RE | CR_TE);
break;
@@ -3471,6 +3473,9 @@ static void rtl_eee_plus_en(struct r8152 *tp, bool enable)
static void rtl_set_eee_plus(struct r8152 *tp)
{
+ if (tp->version == RTL_VER_17)
+ return rtl_eee_plus_en(tp, false);
+
if (rtl8152_get_speed(tp) & _10bps)
rtl_eee_plus_en(tp, true);
else
@@ -3656,6 +3661,7 @@ static void r8153_set_rx_early_timeout(struct r8152 *tp)
case RTL_VER_13:
case RTL_VER_15:
case RTL_VER_16:
+ case RTL_VER_17:
ocp_write_word(tp, MCU_TYPE_USB, USB_RX_EARLY_TIMEOUT,
640 / 8);
ocp_write_word(tp, MCU_TYPE_USB, USB_RX_EXTRA_AGGR_TMR,
@@ -3700,6 +3706,7 @@ static void r8153_set_rx_early_size(struct r8152 *tp)
ocp_data / 8);
break;
case RTL_VER_16:
+ case RTL_VER_17:
ocp_write_word(tp, MCU_TYPE_USB, USB_RX_EARLY_SIZE,
ocp_data / 16);
break;
@@ -4548,6 +4555,7 @@ static void rtl_clear_bp(struct r8152 *tp, u16 type)
break;
case RTL_VER_14:
case RTL_VER_16:
+ case RTL_VER_17:
default:
ocp_write_word(tp, type, USB_BP2_EN, 0);
bp_num = 16;
@@ -5823,6 +5831,7 @@ static void rtl_eee_enable(struct r8152 *tp, bool enable)
case RTL_VER_13:
case RTL_VER_15:
case RTL_VER_16:
+ case RTL_VER_17:
if (enable) {
r8156_eee_en(tp, true);
ocp_reg_write(tp, OCP_EEE_ADV, tp->eee_adv);
@@ -6894,7 +6903,7 @@ static void rtl8156_down(struct r8152 *tp)
PLA_MCU_SPDWN_EN);
r8153b_u1u2en(tp, false);
- if (tp->version != RTL_VER_16) {
+ if (tp->version < RTL_VER_16) {
r8153_u2p3en(tp, false);
r8153b_power_cut_en(tp, false);
}
@@ -8016,7 +8025,7 @@ static void r8157_hw_phy_cfg(struct r8152 *tp)
/* Advanced Power Saving parameter */
ocp_reg_set_bits(tp, 0xa430, BIT(0) | BIT(1));
- /* aldpsce force mode */
+ /* Disable ALDPS force mode */
ocp_reg_clr_bits(tp, 0xa44a, BIT(2));
switch (tp->version) {
@@ -8140,6 +8149,190 @@ static void r8157_hw_phy_cfg(struct r8152 *tp)
sram2_write_w0w1(tp, 0x807c, 0xff00, 0x5000);
sram2_write_w0w1(tp, 0x809d, 0xff00, 0x5000);
break;
+
+ case RTL_VER_17:
+ /* Disable bypass turn off clk in ALDPS */
+ ocp_byte_clr_bits(tp, MCU_TYPE_PLA, 0xd3c8, BIT(0));
+
+ /* Power level tuning
+ * test mode power level
+ */
+ sram_write_w0w1(tp, 0x8415, 0xff00, 0x9300);
+ /* normal link power level 10G, 5G, 2.5G */
+ sram_write_w0w1(tp, 0x81a3, 0xff00, 0x0f00);
+ sram_write_w0w1(tp, 0x81ae, 0xff00, 0x0f00);
+ sram_write_w0w1(tp, 0x81b9, 0xff00, 0xb900);
+ /* nomal link TX filter */
+ sram2_write_w0w1(tp, 0x83b0, 0x0e00, 0);
+ sram2_write_w0w1(tp, 0x83c5, 0x0e00, 0);
+ sram2_write_w0w1(tp, 0x83da, 0x0e00, 0);
+ sram2_write_w0w1(tp, 0x83ef, 0x0e00, 0);
+
+ /* AFE power saving for 2.5G & 5G */
+ sram_write(tp, 0x8173, 0x8620);
+ sram_write(tp, 0x8175, 0x8671);
+
+ sram_write_w0w1(tp, 0x817c, 0, BIT(13));
+ sram_write_w0w1(tp, 0x8187, 0, BIT(13));
+ sram_write_w0w1(tp, 0x8192, 0, BIT(13));
+ sram_write_w0w1(tp, 0x819d, 0, BIT(13));
+ sram_write_w0w1(tp, 0x81a8, BIT(13), 0);
+ sram_write_w0w1(tp, 0x81b3, BIT(13), 0);
+ sram_write_w0w1(tp, 0x81be, 0, BIT(13));
+
+ sram_write_w0w1(tp, 0x817d, 0xff00, 0xa600);
+ sram_write_w0w1(tp, 0x8188, 0xff00, 0xa600);
+ sram_write_w0w1(tp, 0x8193, 0xff00, 0xa600);
+ sram_write_w0w1(tp, 0x819e, 0xff00, 0xa600);
+ sram_write_w0w1(tp, 0x81a9, 0xff00, 0x1400);
+ sram_write_w0w1(tp, 0x81b4, 0xff00, 0x1400);
+ sram_write_w0w1(tp, 0x81bf, 0xff00, 0xa600);
+
+ /* RFI parameter
+ * disable preset FBE
+ */
+ ocp_reg_clr_bits(tp, 0xaeaa, BIT(5) | BIT(3));
+ /* modify PGA for 5G&10G */
+ sram2_write(tp, 0x84f0, 0x201c);
+ sram2_write(tp, 0x84f2, 0x3117);
+ /* RFI parameter */
+ ocp_reg_write(tp, 0xaec6, 0x0000);
+ ocp_reg_write(tp, 0xae20, 0xffff);
+ ocp_reg_write(tp, 0xaece, 0xffff);
+ ocp_reg_write(tp, 0xaed2, 0xffff);
+ ocp_reg_write(tp, 0xaec8, 0x0000);
+ ocp_reg_clr_bits(tp, 0xaed0, BIT(0));
+ ocp_reg_write(tp, 0xadb8, 0x0150);
+ sram2_write_w0w1(tp, 0x8197, 0xff00, 0x5000);
+ sram2_write_w0w1(tp, 0x8231, 0xff00, 0x5000);
+ sram2_write_w0w1(tp, 0x82cb, 0xff00, 0x5000);
+ sram2_write_w0w1(tp, 0x82cd, 0xff00, 0x5700);
+ sram2_write_w0w1(tp, 0x8233, 0xff00, 0x5700);
+ sram2_write_w0w1(tp, 0x8199, 0xff00, 0x5700);
+
+ sram2_write(tp, 0x815a, 0x0150);
+ sram2_write(tp, 0x81f4, 0x0150);
+ sram2_write(tp, 0x828e, 0x0150);
+ sram2_write(tp, 0x81b1, 0x0000);
+ sram2_write(tp, 0x824b, 0x0000);
+ sram2_write(tp, 0x82e5, 0x0000);
+
+ sram2_write_w0w1(tp, 0x84f7, 0xff00, 0x2800);
+ ocp_reg_set_bits(tp, 0xaec2, BIT(12));
+ sram2_write_w0w1(tp, 0x81b3, 0xff00, 0xad00);
+ sram2_write_w0w1(tp, 0x824d, 0xff00, 0xad00);
+ sram2_write_w0w1(tp, 0x82e7, 0xff00, 0xad00);
+ ocp_reg_w0w1(tp, 0xae4e, 0x000f, 0x0001);
+ sram2_write_w0w1(tp, 0x82ce, 0xf000, 0x4000);
+
+ /* 5G shift sel, default = '04'
+ * 10G shift sel, default = '03'
+ */
+ sram2_write_w0w1(tp, 0x83a5, 0xff00, 0x0400);
+ sram2_write_w0w1(tp, 0x83a6, 0xff00, 0x0400);
+ sram2_write_w0w1(tp, 0x83a7, 0xff00, 0x0400);
+ sram2_write_w0w1(tp, 0x83a8, 0xff00, 0x0400);
+
+ /* XG INRX parameters
+ * RC coefficients
+ */
+ sram2_write(tp, 0x84ac, 0x0000);
+ sram2_write(tp, 0x84ae, 0x0000);
+ sram2_write(tp, 0x84b0, 0xf818);
+ sram2_write_w0w1(tp, 0x84b2, 0xff00, 0x6000);
+ /* Training AAGC PAR (with uc2 patch) */
+ sram2_write(tp, 0x8ffc, 0x6008);
+ sram2_write(tp, 0x8ffe, 0xf450);
+ /* DAC BGK */
+ sram2_write_w0w1(tp, 0x8015, 0, BIT(9));
+ sram2_write_w0w1(tp, 0x8016, 0, BIT(11));
+ sram2_write_w0w1(tp, 0x8fe6, 0xff00, 0x0800);
+ sram2_write(tp, 0x8fe4, 0x2114);
+ /* 10G PBO table */
+ sram2_write(tp, 0x8647, 0xa7b1);
+ sram2_write(tp, 0x8649, 0xbbca);
+ sram2_write_w0w1(tp, 0x864b, 0xff00, 0xdc00);
+ /* 2.5G ado power window size */
+ sram2_write_w0w1(tp, 0x8154, 0xc000, 0x4000);
+ sram2_write_w0w1(tp, 0x8158, 0xc000, 0);
+ /* 10G lock far */
+ sram2_write(tp, 0x826c, 0xffff);
+ sram2_write(tp, 0x826e, 0xffff);
+ /* XG INRX parameter */
+ sram2_write_w0w1(tp, 0x8872, 0xff00, 0x0e00);
+ sram_write_w0w1(tp, 0x8012, 0, BIT(11));
+ sram_write_w0w1(tp, 0x8012, 0, BIT(14));
+ ocp_reg_set_bits(tp, 0xb576, BIT(0));
+ sram_write_w0w1(tp, 0x834a, 0xff00, 0x0700);
+ sram2_write_w0w1(tp, 0x8217, 0x3f00, 0x2a00);
+ sram_write_w0w1(tp, 0x81b1, 0xff00, 0x0b00);
+ sram2_write_w0w1(tp, 0x8fed, 0xff00, 0x4e00);
+ /* Slave about EC mu of datamode AAGC and DAC BG */
+ sram2_write_w0w1(tp, 0x88ac, 0xff00, 0x2300);
+ /* improve UBE */
+ ocp_reg_set_bits(tp, 0xbf0c, 0x7 << 11);
+ /* close Sparse NEC, improve connect 5EUU calble performace */
+ sram2_write_w0w1(tp, 0x88de, 0xff00, 0);
+ /* 5G slave compatibility issue (will include in v10) */
+ sram2_write(tp, 0x80b4, 0x5195);
+
+ /* XG Test Mode
+ * xgtstm_map_tbl for mdi_cap_sel
+ */
+ sram_write(tp, 0x8370, 0x8671);
+ sram_write(tp, 0x8372, 0x86c8);
+ /* xgtstm_amp_map_tbl for REG_IBX_UP_SHIFT_L */
+ sram_write(tp, 0x8401, 0x86c8);
+ sram_write(tp, 0x8403, 0x86da);
+ sram_write_w0w1(tp, 0x8406, 0x1800, 0x1000);
+ sram_write_w0w1(tp, 0x8408, 0x1800, 0x1000);
+ sram_write_w0w1(tp, 0x840a, 0x1800, 0x1000);
+ sram_write_w0w1(tp, 0x840c, 0x1800, 0x1000);
+ sram_write_w0w1(tp, 0x840e, 0x1800, 0x1000);
+ sram_write_w0w1(tp, 0x8410, 0x1800, 0x1000);
+ sram_write_w0w1(tp, 0x8412, 0x1800, 0x1000);
+ sram_write_w0w1(tp, 0x8414, 0x1800, 0x1000);
+ sram_write_w0w1(tp, 0x8416, 0x1800, 0x1000);
+
+ /* Cable Test Patch */
+ sram_write(tp, 0x82bd, 0x1f40);
+
+ /* Thermal sensor parameters */
+ ocp_reg_w0w1(tp, 0xbfb4, 0x07ff, 0x0328);
+ ocp_reg_write(tp, 0xbfb6, 0x3e14);
+
+ /* spdchg_gtx_shape_100M */
+ ocp_reg_write(tp, OCP_SRAM_ADDR, 0x81c4);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x003b);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x0086);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x00b7);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x00db);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x00fe);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x00fe);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x00fe);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x00fe);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x00c3);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x0078);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x0047);
+ ocp_reg_write(tp, OCP_SRAM_DATA, 0x0023);
+
+ /* lsbmsk_parameters
+ * RL6961_lsbmsk_parameter_250207
+ */
+ sram2_write(tp, 0x88d7, 0x01a0);
+ sram2_write(tp, 0x88d9, 0x01a0);
+ sram2_write(tp, 0x8ffa, 0x002a);
+
+ sram2_write(tp, 0x8fee, 0xffdf);
+ sram2_write(tp, 0x8ff0, 0xffff);
+ sram2_write(tp, 0x8ff2, 0x0a4a);
+ sram2_write(tp, 0x8ff4, 0xaa5a);
+ sram2_write(tp, 0x8ff6, 0x0a4a);
+ sram2_write(tp, 0x8ff8, 0xaa5a);
+
+ sram2_write_w0w1(tp, 0x88d5, 0xff00, 0x0200);
+ break;
+
default:
break;
}
@@ -8175,6 +8368,18 @@ static void r8157_hw_phy_cfg(struct r8152 *tp)
set_bit(PHY_RESET, &tp->flags);
}
+static int r8159_wait_backup_restore(struct r8152 *tp)
+{
+ u32 ocp_data;
+
+ ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_MISC_0);
+ if (!(ocp_data & PCUT_STATUS))
+ return 0;
+
+ return poll_timeout_us(ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_GPHY_CTRL),
+ ocp_data & BACKUP_RESTRORE, 200, 2000, false);
+}
+
static void r8156_init(struct r8152 *tp)
{
u32 ocp_data;
@@ -8184,14 +8389,14 @@ static void r8156_init(struct r8152 *tp)
if (test_bit(RTL8152_INACCESSIBLE, &tp->flags))
return;
- if (tp->version == RTL_VER_16) {
+ if (tp->version == RTL_VER_16 || tp->version == RTL_VER_17) {
ocp_byte_set_bits(tp, MCU_TYPE_USB, 0xcffe, BIT(3));
ocp_byte_clr_bits(tp, MCU_TYPE_USB, 0xd3ca, BIT(0));
}
ocp_byte_clr_bits(tp, MCU_TYPE_USB, USB_ECM_OP, EN_ALL_SPEED);
- if (tp->version != RTL_VER_16)
+ if (tp->version < RTL_VER_16)
ocp_write_word(tp, MCU_TYPE_USB, USB_SPEED_OPTION, 0);
ocp_word_set_bits(tp, MCU_TYPE_USB, USB_ECM_OPTION, BYPASS_MAC_RESET);
@@ -8205,6 +8410,7 @@ static void r8156_init(struct r8152 *tp)
case RTL_VER_13:
case RTL_VER_15:
case RTL_VER_16:
+ case RTL_VER_17:
r8156b_wait_loading_flash(tp);
break;
default:
@@ -8221,6 +8427,11 @@ static void r8156_init(struct r8152 *tp)
return;
}
+ if (tp->version == RTL_VER_17 && r8159_wait_backup_restore(tp)) {
+ dev_err(&tp->intf->dev, "init failed, backup-restore timed out\n");
+ return;
+ }
+
data = r8153_phy_status(tp, 0);
if (data == PHY_STAT_EXT_INIT) {
ocp_reg_clr_bits(tp, 0xa468, BIT(3) | BIT(1));
@@ -8236,7 +8447,7 @@ static void r8156_init(struct r8152 *tp)
data = r8153_phy_status(tp, PHY_STAT_LAN_ON);
- if (tp->version == RTL_VER_16)
+ if (tp->version >= RTL_VER_16)
r8157_u2p3en(tp, false);
else
r8153_u2p3en(tp, false);
@@ -8247,7 +8458,7 @@ static void r8156_init(struct r8152 *tp)
/* U1/U2/L1 idle timer. 500 us */
ocp_write_word(tp, MCU_TYPE_USB, USB_U1U2_TIMER, 500);
- if (tp->version == RTL_VER_16)
+ if (tp->version >= RTL_VER_16)
r8157_power_cut_en(tp, false);
else
r8153b_power_cut_en(tp, false);
@@ -8294,7 +8505,10 @@ static void r8156_init(struct r8152 *tp)
set_bit(GREEN_ETHERNET, &tp->flags);
/* rx aggregation / 16 bytes Rx descriptor */
- if (tp->version == RTL_VER_16)
+ if (tp->version == RTL_VER_17)
+ ocp_word_clr_bits(tp, MCU_TYPE_USB, USB_USB_CTRL,
+ RX_AGG_DISABLE | RX_DESC_16B | BIT(11));
+ else if (tp->version == RTL_VER_16)
ocp_word_clr_bits(tp, MCU_TYPE_USB, USB_USB_CTRL, RX_AGG_DISABLE | RX_DESC_16B);
else
ocp_word_clr_bits(tp, MCU_TYPE_USB, USB_USB_CTRL, RX_AGG_DISABLE | RX_ZERO_EN);
@@ -8302,7 +8516,7 @@ static void r8156_init(struct r8152 *tp)
if (tp->version < RTL_VER_12)
ocp_byte_set_bits(tp, MCU_TYPE_USB, USB_BMU_CONFIG, ACT_ODMA);
- if (tp->version == RTL_VER_16) {
+ if (tp->version >= RTL_VER_16) {
/* Disable Rx Zero Len */
rtl_bmu_clr_bits(tp, 0x2300, BIT(3));
/* TX descriptor Signature */
@@ -9690,6 +9904,29 @@ static int rtl_ops_init(struct r8152 *tp)
r8157_desc_init(tp);
break;
+ case RTL_VER_17:
+ tp->eee_en = true;
+ tp->eee_adv = MDIO_EEE_100TX | MDIO_EEE_1000T | MDIO_EEE_10GT;
+ tp->eee_adv2 = MDIO_EEE_2_5GT | MDIO_EEE_5GT;
+ ops->init = r8156_init;
+ ops->enable = rtl8156_enable;
+ ops->disable = rtl8153_disable;
+ ops->up = rtl8156_up;
+ ops->down = rtl8156_down;
+ ops->unload = rtl8153_unload;
+ ops->eee_get = r8153_get_eee;
+ ops->eee_set = r8152_set_eee;
+ ops->in_nway = rtl8153_in_nway;
+ ops->hw_phy_cfg = r8157_hw_phy_cfg;
+ ops->autosuspend_en = rtl8157_runtime_enable;
+ ops->change_mtu = rtl8156_change_mtu;
+ tp->rx_buf_sz = 48 * 1024;
+ tp->support_2500full = 1;
+ tp->support_5000full = 1;
+ tp->support_10000full = 1;
+ r8157_desc_init(tp);
+ break;
+
default:
ret = -ENODEV;
dev_err(&tp->intf->dev, "Unknown Device\n");
@@ -9843,6 +10080,9 @@ static u8 __rtl_get_hw_ver(struct usb_device *udev)
case 0x1030:
version = RTL_VER_16;
break;
+ case 0x2020:
+ version = RTL_VER_17;
+ break;
default:
version = RTL_VER_UNKNOWN;
dev_info(&udev->dev, "Unknown version 0x%04x\n", ocp_data);
@@ -10160,6 +10400,7 @@ static const struct usb_device_id rtl8152_table[] = {
{ USB_DEVICE(VENDOR_ID_REALTEK, 0x8155) },
{ USB_DEVICE(VENDOR_ID_REALTEK, 0x8156) },
{ USB_DEVICE(VENDOR_ID_REALTEK, 0x8157) },
+ { USB_DEVICE(VENDOR_ID_REALTEK, 0x815a) },
/* Microsoft */
{ USB_DEVICE(VENDOR_ID_MICROSOFT, 0x07ab) },
--
2.47.3
next prev parent reply other threads:[~2026-04-29 17:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-29 17:01 [PATCH net-next v2 0/4] r8152: Add support for the RTL8159 10Gbit USB Ethernet chip Birger Koblitz
2026-04-29 17:01 ` [PATCH net-next v2 1/4] r8152: Add support for 10Gbit Link Speeds and EEE Birger Koblitz
2026-05-01 1:15 ` Jakub Kicinski
2026-05-02 4:18 ` Birger Koblitz
2026-04-29 17:01 ` Birger Koblitz [this message]
2026-05-01 1:15 ` [PATCH net-next v2 2/4] r8152: Add support for the RTL8159 chip Jakub Kicinski
2026-05-02 4:39 ` Birger Koblitz
2026-04-29 17:01 ` [PATCH net-next v2 3/4] r8152: Add irq mitigation for RTL8157/9 Birger Koblitz
2026-05-01 1:16 ` Jakub Kicinski
2026-05-02 4:41 ` Birger Koblitz
2026-04-29 17:01 ` [PATCH net-next v2 4/4] r8152: Add firmware upload capability for RTL8157/RTL8159 Birger Koblitz
2026-04-29 22:01 ` [PATCH net-next v2 0/4] r8152: Add support for the RTL8159 10Gbit USB Ethernet chip Aleksander Jan Bajkowski
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